public IActionResult Register([FromBody] Rider rider)
        {
            try
            {
                //if (ModelState.IsValid)
                {
                    if (_service.UserNameExists(rider.UserName))
                    {
                        return(Unauthorized());
                    }

                    // A valid new rider to be added
                    AuthorizationResponseData ResponseData = _service.AddRiderWAuthorization(rider);
                    return(Ok(ResponseData));
                }
            }
            catch (DbUpdateException /* ex */)
            {
                //Log the error (uncomment ex variable name and write a log.
                ModelState.AddModelError("", "Unable to save changes. " +
                                         "Try again, and if the problem persists " +
                                         "see your system administrator.");
            }
            return(BadRequest("Unable to save changes. Try again."));
        }